Amazon Web Services' price drops for certain long-term cloud contracts expands the cost gap between Linux and Windows on EC2.
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Amazon Web Services Monday reduced its prices on its lowest cost option, reserved instances, by "up to 27%." That means a reserved instance virtual server may cost 65% less than the comparable on-demand instance running on the AWS EC2 infrastructure at $0.06 per hour.
One effect of the move is to reinforce the perception that it's much cheaper to run Linux than Windows on EC2. Amazon has been wary of Microsoft as a potent competitor with its Windows Server and Visual Studio tools in Windows Azure.
The 65% cheaper distinction applies only to virtual servers running Linux/Unix. A small or M1 standard virtual server, which comes with 1.7 GB of memory and CPU equal to an early 2006 Xeon processor, requires a $61 upfront payment and is available at a rate of $0.034 per hour.
The comparable-sized Windows server requires a $69 upfront payment, after which it is available for $0.059 per hour.
Both of these small servers fall into the one-year, "light" utilization category of reserved instances.
The longer term, three-year reserved instances are priced lower. For a $96 upfront payment, the small, lightly utilized Linux server is available at $0.027 an hour. The comparable Windows server requires a $106.30 upfront payment with a rate of $0.051 per hour.
When it comes to Linux, EC2 can host Ubuntu, Debian, Cent OS, Red Hat Fedora, Gentoo Linux, Oracle Linux, Red Hat Enterprise and Suse Linux. FreeBSD is the only version of Unix available.
The 27% reduction also applies to second generation, standard M3 Linux Servers, virtual servers that come in extra-large and double-extra-large sizes. The second generation name means it has up to 50% more CPU power than the comparable first generation server, or up to eight virtual CPUs in an extra-large instance. A one year, reserved instance of a second generation M3 Linux server, after the price reduction, is $517 upfront, with a charge of $0.299 per hour. The three-year M3 reserved instance requires $807 upfront, and is available at $0.236 per hour.
Comparable Windows servers, with no 27% price reductions, are: one year, $607 upfront, $0.504 per hour; three year, $935 upfront, $0.432 per hour.
Prices on the double-extra-large instances are simply double the just stated extra-large pricing, whether Linux or Windows.
The reserved instance price reduction is the 26th such cut announced by Amazon, which has vowed to lower its charges. "We are delighted to continue to pass along savings to you as we innovate and drive down our costs," the announcement said.
The reductions also have the benefit of making it more difficult for competitors to match pricing on AWS's EC2 instance offerings, or for new competitors to enter the infrastructure-as-a-service business and make a profit.
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